#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<iostream>
int main()
{
	//int a = 0;
	//int b = 0;
	//scanf("%d", &a);
	//scanf("%d", &b);
	//if (a >= -1 && a <= 1 && b >= -1 && b <= 1)
	//{
	//	printf("yes");

	//}
	//else
	//{
	//	printf("no");
	//}
	int xa = 0;
	int ya = 0;
	int xb = 0;
	int yb = 0;
	
	








	return 0;
}